Use place value cards to practice rounding numbers to the nearest ten and hundred. Warm up with a Mystery Math Mistake to hunt for the mistake made counting up on the number line. Use place value ...

Learning to assess the reasonableness of an answer is an important mathematical skill. Learning to assess the reasonableness of an answer is an important mathematical skill. It’s your child’s way of ...

Imagine needing to estimate the total cost of the items in your grocery basket to decide whether to put something back. So you round to the nearest dollar for each potential purchase, using the “round ...

Hi Albert, wow that’s a lot of sweets. What’s Jerry doing? Ah, labelling each jar with the number of sweets. But how do you now how many sweets each jar can hold? Oh wow, impressive. With something ...

For statistical and mathematical purposes, OpenOffice.org's Calc spreadsheet includes a variety of ways to round off numbers. If you're a programmer, you may also be familiar with some of these ...